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Line post type porcelain insulators |
ANSI Class |
|
57-1 |
57-2 |
57-3 |
57-4 |
57-5 |
Dimensions |
Creepage distance |
mm |
356 |
559 |
737 |
1015 |
1145 |
Dry arcing distance |
mm |
165 |
241 |
311 |
368 |
438 |
Mechanical Values |
Cantilever strength |
kn |
12.5 |
12.5 |
12.5 |
12.5 |
12.5 |
Cantilever strength routine test |
kn |
5 |
5 |
5 |
5 |
5 |
Electrical Values |
Type application voltage |
kv |
25 |
35 |
45 |
55 |
66 |
Low frequency dry flashover voltage |
kv |
80 |
110 |
125 |
150 |
175 |
Low frequency wet flashover voltage |
kv |
60 |
85 |
100 |
125 |
150 |
Critical impulse flashover voltage,positive |
kv |
130 |
180 |
210 |
255 |
290 |
Critical impulse flashover voltage,negative |
kv |
155 |
205 |
260 |
340 |
380 |
Radio influence Voltage Data |
Test voltage RMS to ground |
kv |
15 |
22 |
30 |
44 |
44 |
Maximum RIV at 1000kHz |
μv |
100 |
100 |
200 |
200 |
200 |
Packing and Shipping Data |
Net weight,approximate |
kg |
5.2 |
9.0 |
11.0 |
16.0 |
18.0 |